Furnace for fire-finishing glassware.



No. 633,985. Patented Oct. 3, I899. W. BUTTLER."

FURNACE FOR FIRE FINISHING GLASSWARE.

(Application mm Jan. 5, 1898.-

2 Sheets-Sheet (No Medal.)

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Patented Dot. 3;!899. W. BUTTLEB. v FUBNACE FOBJIBE FINISHING GLASSWA RE.

(Application filed Jam. 5, 1898.)

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UNITED STATES.-

PATENT OFFICE.

WILLIAM BUTTLER, OF REDKEY, INDIANA.

FURNACE FOR FIRE-FINISHING GLASSWARE.

SPECIFICATION'forming part of Letters liatent No. 633,985, dated October 3, 1899.

I I Application filed January 5, 1898 Serial No. 665,648. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM BUTTLER, of Redkey, in thecounty of Jay and State of Indiana, have invented a new and useful Improvement in Furnaces for Fire-Finishing Glassware, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part ofthis specification, in which-- Figure l is a front elevation, partly in section, of my improved furnace. Fig. 2 is a top plan view of the same, and Fig. 3 is a broken side elevation showing additional mechanism for giving rapid rotation to the glass articles.

My invention relates to the fire-finishing or glazing of the ends of glass articles, and is designed to provide an improved furnace by which this operation may be easily and quickly carried out.

In the drawings, ,2 represents the furnace proper, Whichconsists of a semi-annular shell lined with refractory material and preferably provided with an intermediate concentric partition 3, which divides the furnace-cha1nher into two separate portions. Into each of these furnace-chambers thus formed project a series of gas-burners l and 5, respectively, the heatedproducts from. which escape through the arc-shaped slot 6 in the top of the furnace. To carry the ends of glass articles through this curved slot, I'provide the central vertical shaft 7, actuated by beveled gear 8 and provided with horizontal carryingarms 9. At the outer end of each of these arms is provided an annular. holder 10, adapted to receive a loose flanged ring 11, having projecting radial pins 12.. These pinsare ar- "ranged to contact withsuitable pins 13' upon a semicircular rack 14, so that asthe shaft 7 is slowly rotated therings 11 will move in a circular path over the slot and the rings will'be rotated during such movement, thus rotating the chimneys or other articles'le, which hang within the rings. In some cases the chimneys or glass articles are made slightly heavier on I one side than on theother, and if these arti cleswere rotated during the fire-finishing I 1 heavy side.

the thin side would come out shorter'than the To prevent this and to glaze both sides equally, I employ plain ringsgvhich are placed inthe holders 10, instead of the rings having projecting pins, and arrange the gas-burners so that the heat will be more intense atone side of the partition-wall than on the other. The operator may then-place the chimneys in the holding-rings so that the thicker side will-be exposed to the greater heat, the article passing through the slot Without rotation. In place of either form of these holding-rin gs, where it is desired to give a higher speed of rotation to the article, I

may employ the mechanism of Fig. 3. In this figure 7 '1 represents the central shaft, provided with lower arms 9'. and upper arms 9". The outer ends of the arms 9' are slotted and provided with upwardly-extending lugs 16, which are arranged to contact with rings 17, secured to the handles 18 of the snaps,which hold the glass articles at their lower The upper end of each handle is squared and engages a square hole in a chuck 19. This chuck is mounted at the lower end of a short shaft carried in the upper arm and provided at its upper end with a pinion 20, engaging a toothed wheel 21. upon a second shaft, also nected to the chuck.

,The operation is apparent. The articles being inserted either in the holding-rings or V in the snap are moved with their lower ends withintheslot of the furnace are thus sufficiently heated to remove the sharp edge thereof, while the heated currents of air. rising around the body of the article. partially anneal-the same and prevent breakage. The articles may be rotated either at a higher low rate of speed or may be moved through the slot without rotation, the heat of and these ends 7 the slot being regulated, as desired, on each side of the partition.

The advantages of my inventionresultfrom the fact that the articles may be fire-finished much'inore'quickly than before and without the use of expensive and slow labor therefor.

The semicircularform of the furnace renders the arrangement for giving rotation to the central shaft in a vertical position with their lower ends Within the slotgsubstantially as described.

' 2. A fire-finishing furnace having anelongated slot, said furnace having an inner 1011-, gitudinal partition-wall and burners on both sides of the wall whereby the heat'may be regulated todit'ferent degrees on opposite sides thereof substantially as described.

3. The combination with a furnace having in its top a slot extending substantially in'the are of a circle, of a rotatory shaft having lat eral carrying arms provided with holders above and exterior to the furnace and arranged to support the articles in a vertical position with their lower ends exposed to the heat Within the slot, and mechanism for ro tating said holders during their movement; substantially as described.

t- The combination with a furnace having in its top a slot extending substantially in the arc of a circle, of a rotatory shaft having arms provided with holders above the furnace and arranged to hold the articles with their lower ends subjected to the heat within the slot, an'arc-shaped rack, and gear connec- I tions between the rack and the holders and arranged to rotate the same during their movement over the slot; substantially as described.

5. A fire-finishing furnace, having a longitudinal slot in its walls, a removable snap, I

means for holding thesnap with the inner end of the articlein the slot, and mechanism for moving the article through theslot; substantially as described.

6. A fire-finishing furnace, having an elongated slot, a removable snap, supports arranged to hold the snap with the inner end'of the article in the slot, an'd'mechanism'forrotating the snap and moving it longitudinally of the slot; substantially as described.

, In testimony whereof I have hereunto set my hand.

\VILLIAM BUTTLER.

\Vitnesses:

FRED WoL'rJEN, O. L. KEMER. 

